Solve r^9 -1 - ScanMath

Evaluate

r^{9} - 1

Rewrite the expression in exponential form

r^{9} - 1^{3}

Use a^{3} - b^{3} = (a - b) (a^{2} + ab + b^{2}) to factor the expression

(r^{3} - 1) (r^{6} + r^{3} \times 1 + 1^{2})

Any expression multiplied by 1 remains the same

(r^{3} - 1) (r^{6} + r^{3} + 1^{2})

1 raised to any power equals to 1

(r^{3} - 1) (r^{6} + r^{3} + 1)

Solution

More Steps

(r - 1) (r^{2} + r + 1) (r^{6} + r^{3} + 1)

R^9 1